This stellar swarm is M80 (NGC 6093), one of the densest of the 147 known globular star clusters in the Milky Way galaxy. Located about 28,000 light-years from Earth, M80 contains hundreds of thousands of stars, all held together by their mutual gravitational attraction. Globular clusters are particularly useful for studying stellar evolution, since all of the stars in the cluster have the same age (about 15 billion years), but cover a range of stellar masses.

This stellar swarm is (NGC one of the densest of the 147 known globular star clusters

The NASA/ESA Hubble Space Telescope observes the center of the globular cluster Messier 22, also known as M22.

Hubble Stares into the Crammed Center of Messier 22

This image shows the center of the globular cluster Messier also known as as observed by the NASA/ESA Hubble Space Telescope. Globular clusters are spherical collections of densely packed stars, relics of the early .

The Great Globular Cluster In Hercules

Messier 13 or (also designated NGC 6205 and sometimes called the Great Globular Cluster in Hercules or the Hercules Globular Cluster), is a globular cluster in the constellation of Hercules.

hubble space image poster GLOBULAR CLUSTER NGC 1850 24X36 supernova NEW

hubble space image poster GLOBULAR CLUSTER NGC 1850 24X36 supernova NEW

Hubble Sees an Ancient Globular Cluster This image captures the stunning NGC 6535, a globular cluster 22,000 light-years away in the constellation of Serpens (The Serpent) that measures one light-year across.

Hubble Sees an Ancient Globular Cluster

This image captures the stunning NGC a globular cluster light-years away in the constellation of Serpens (The Serpent) that measures one light-year across. Globular clusters are tightly bound groups of stars which orbit galaxies.

Hubble's Messier 9 Globular Cluster Photo-shows hundreds of thousands of glittering stars shine in a cluster at the center of our galaxy in a new photograph from the Hubble Space Telescope.

LOOK: Vast Star Cluster Shines In High-Res Hubble Telescope Image

Crushed diamonds on dark sand? It's the Rainbow Star Cluster The globular cluster Messier 9 shines in this new photo from the Hubble Space Telescope.

A map of the Milky Way, showing pulsars (red), planetary nebulae (blue), globular clusters (yellow), and the orbits of several stars. http://en.wikipedia.org/wiki/Milky_Way

And you thought your day was busy? we-are-star-stuff: A map of our galaxy the Milky Way, showing pulsars (red), planetary nebulae (blue), globular clusters (yellow), and the orbits of several stars. And yet our galaxy is a tiny place.

Globular cluster Messier 9 (M9) has over 300,000 stars within a diameter of about 90 light-years. It is 25,000 light-years from Earth, near the central bulge of our Milky Way galaxy in the constellation of Sagittarius. Imagine the night sky on a planet orbiting one of these stars!

Messier 9 The globular star cluster Messier 9 has over stars within a diameter of about 90 light years. It is light years from Earth, near the central bulge of our Milky Way galaxy in the constellation of Sagittarius.

Globular Cluster NGC 6397    http://hubblesite.org/newscenter/archive/releases/star/2006/37/

all the stars in the sky. Globular Cluster NGC 6397 NASA ESA & H. Richer (university of British Columbia)

Globular clusters are big balls of old stars that orbit around their host galaxy. It has long been believed that all the stars within a globular cluster form at the about same time, a property which can be used to determine the cluster's age. http://www.wired.com/2014/08/wired-space-photo-of-the-day-for-august-2014/

Space Photo of the Day for August 2014

distant-traveller: “ IC A globular cluster’s age revisited “ This new NASA/ESA Hubble Space Telescope image shows the globular cluster IC Globular clusters are big balls of old stars that.

Super Star Cluster #Westerlund2! This cluster is so massive that it is expected to eventually evolve into a globular cluster.  It hosts a dozen O-class hypergiant stars, each one with a luminosity 30,000 - 1,000,000 times greater than that of our Sun.

infinity-imagined: Super Star Cluster Westerlund This cluster is so massive that it is expected to eventually evolve into a globular cluster. It hosts a dozen O-class hypergiant stars, each one with a luminosity - times greater than that of our Sun.

M13: The Great Globular Cluster in Hercules Image Credit & Copyright: Martin Pugh M13 is now modestly recognized as the Great Globular Cluster in Hercules, one of the brightest globular star clusters in the northern sky. Telescopic views reveal the spectacular cluster's hundreds of thousands of stars. At a distance of 25,000 LYrs, the cluster stars crowd into a region 150 LYrs in diameter, but approaching the cluster core upwards of 100 stars could be contained in a cube just 3 LYrs on a…

STARSBURNS known as the Great Globular Cluster in Hercules, is one of the brightest globular star clusters in the northern sky. Telescopic views reveal the spectacular cluster’s hundreds of.

M72: A Globular Cluster of Stars (Aug 19 2012) Image Credit: NASA, ESA, Hubble, HPOW Explanation: Globular clusters once ruled the Milky Way. Back in the old days, back when our Galaxy first formed, perhaps thousands of globular clusters roamed our Galaxy. Today, there are less than 200 left. Many globular clusters were destroyed over the eons by repeated fateful encounters with each other or the Galactic center. #astronomy

There are few, if any, young globular clusters in our Milky Way Galaxy because conditions are not ripe for more to form. Pictured above by the Hubble Space Telescope are about of stars. which spans about 50 light years and lies about light years away

n-a-s-a: “  A map of our galaxy the Milky Way, showing pulsars (red), planetary nebulae (blue), globular clusters (yellow), and the orbits of several stars ”

n-a-s-a: “ A map of our galaxy the Milky Way, showing pulsars (red), planetary nebulae (blue), globular clusters (yellow), and the orbits of several stars ” Mais

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